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Design and evaluation of a multi-modulation retrodirective RFID tag | IEEE Conference Publication | IEEE Xplore

Design and evaluation of a multi-modulation retrodirective RFID tag


Abstract:

Movement towards mm-wave backscatter communications in radio-frequency identification (RFID) systems necessitates seeking designs that compensate for the path loss introd...Show More

Abstract:

Movement towards mm-wave backscatter communications in radio-frequency identification (RFID) systems necessitates seeking designs that compensate for the path loss introduced by the radio channel. A viable, simple, and power-efficient solution is to equip RFID tags with retrodirective arrays, which guarantee reflection with maximal gain in the direction of incidence. In this paper, we design and implement an original retrodirective tag in which its feeding network is a properly-terminated rat-race coupler. We start by deriving the required terminations that ensure retrodirectivity. Then, we build a retrodirective tag and experimentally compare its radar cross section to that of a single-antenna tag. The measurements reveal that the radar cross section of the proposed retrodirective tag is, on average, approximately 6 dB more than that of a single-antenna tag while both tags have the same field-of-view. From the promising results in this paper, the proposed design is a potential candidate for next-generation microwave and mm-wave RFID tags because it is compatible with low-power reflection amplifiers (e.g., tunnel diodes), it can implement multiple modulation schemes without changing the circuit layout, and it can be implemented using only a single RF switch.
Date of Conference: 10-12 April 2018
Date Added to IEEE Xplore: 11 June 2018
ISBN Information:
Electronic ISSN: 2573-7635
Conference Location: Orlando, FL, USA

References

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